$147.25 34 Liter Hydrogen Sulfide (H2S), Carbon Monoxide (CO), Methane (CH4), Oxygen (O2) quantity Add to cart SKU: GFX34-155-5300-I Category: Gas Cylinders Description Description H2S 25 ppm/ CO 100 ppm/ CH4 2.5% (50% LEL)/ O2 18.0%/ N2 Related products Methane (CH₄) Calibration Gas – 20% LEL – 103L Cylinder $95.00 Add to cart Oxygen (O₂) Calibration Gas – 20.9% – 103L Cylinder $95.00 Add to cart Hydrogen Chloride (HCl) Calibration Gas – 5 ppm – 60L Cylinder $304.00 Add to cart Hydrogen Cyanide (HCN) Calibration Gas – 10 ppm – 60L Cylinder $232.75 Add to cart